Preheater attachment for boilers



Oct. 2, 1928.

L. O. GARRAWAY PREHEATER ATTACHMENT FOR BOILERS 3 Sheets-Sheet Filed Oct. 16, 1924 Oct. 2, 1928.

L. O. GARRAWAY Z REHEATER ATTACHMENT F OR BOILERS Filed 001216. 1924 5QShQetS-Sheet 2 L. 0. G'arra Qy gwuento'o 3 S eats-Sheet :5 L. 0. Gar/army L. O. GARRAWAY PREHEATER ATTACHMENT FOR BOILERS Filed Oct 16 1924 Oct. 2, 1928.

Patented Get. 2, 1928 airs stares 'LEE 0. GARRAWAY, or MEMPHIS, TENNESSEE.

'PREHEATER ATTACHMENT Eon EoiLERs.

Application fi led Getober 16, 1924. Serial No. 744,091.

The present invention relates to an attachment for boilers adapted to preheat the feed water beforeientering the boiler.

The object of the present invention is to provide an attachment for boilers which will heat the water twice and for thispurpose use the exhaust steam which is generally wasted, and the invention is equally well suit-ed for engines equipped with lifting or non-lifting injectors or pumps or any other means for supplying water to the boiler.

In the accompanying drawings: Figure 1 is a side elevation of a modern locomotive with some parts removed and my heater attachmentemploying a non-lifting injector installed; I

Fig. 2is a transverse section on the line 2-2 of Fig. 1;

Fig. 3 is a section on the line 83 of Fig. 1; Fig. 4: is a detail partly in section and part ly in plan of a circulating coil; I

Fig. 5 is a section on the line 5-5 of Fig. 1; Fig. 6 is a detail section on the line 6-6 of Fig. 1. j r Fig. 7 is a'detail showing the connection between the initial heating tank and the main supply tank. In the drawings, the reference numeral 10 represents a locomotive of any modern type provided with a cylinder saddle 11 and a smoke box 12. The reference numeral 13 designates the water intake port to the boiler and the numeral l l denotes a circulating coil for the feed water which makes several turns in the heater casing 15 so as to heat the water on its way to the boiler intake port 13. The coil l l is a part ofthe water feed pipe 16 which extends from the non-lifting injector 1? and is equipped with the boiler check" valve 18; The heater casing ,15 extends longitudinally upon'the side of the boiler near the top thereof, and the front end of the coil extends from the casing, as at 19, to the intake port '13. 20 is the usual live steam 4 intake pipe and'21 is the overflow pipe. The exhaust steam escaping from the cylinder saddle passes through an oil separating device 22 which islmounted upon the rear end of the saddle and has one or more perforated 5 metallic plates 23 (see Figs. 2 and 6) covered with an oil absorbing cloth or fabric 2i of any approved texture. vThe oil absorbing fabric is caused to completely encase the metallic plate and the covered plateis then 55 slid into engagement with cleats or grooves,.

indicated at 25, and the outer side of the oil I branches 27 into the front ends of the heater casings 15 which are provided one'on each side of the bo1ler. From the rear end of each said casing, a pipe 28 leads into thetank 29 which is fed from the supply tank 30 through a hose'81 anda pipe 32, and 33 is a pipe leading the heated water from the tank 29 into the injector 17. 'As will be understood on reference to Figs. 1. and 5, the tank 29 '70 extends across beneath the frame of the em gineand connects the feed pipes on the op posite sides thereof. I

34 and 35 are controlling rods passing up into the cab to'permit the closing or opening, at will, of the water inlet valve to the injector and the overflow valve, respectively. 86 designates the ports or passages through i which the exhaust steam enters the oil separators. r

In the heater 15, I propose to make several turns of the pipe 14, as shown by F igs. 1 and i of the drawings, or use a series of pipes for the water to travel through on its Way to the boiler. The heater casing 15 is placed on top of the asbestos lagging 37 which covers the boiler, and beneath the jacket 38, (see Fig. 3)

The operation of the preheater attachment is as follows: The exhaust steam is takenfrom the exhaust cavities, and when the throttle valve is opened theexhaust steam will back up from the exhaust cavities through the apertures 36in the cylinder saddle and then flow through the oil separators and the pipe 26 into the main heater casing 15, flowing around the coil 14L and heating the'water in the coil. This forms the main heating stage ofv the water. From the heater casing 15, the exhaust steam is led by thepipe 28 into the heating and condensation tank 29 where 100.

the heat from the steam is imparted to the water and the steam is condensed in the water to return to theboiler. This forms'the' first heating stage of the Water.

"VJ hen in the claims the term rconduit for 5 i heater may be omitted and the pipe 26 coupled directly to the pipe 28.

Having thus described the invention, I claim":

1. A feed water heater system for locomotives comprising a tank arranged below the fire box and in rear of the locomotive boiler and receiving water by gravity froma source of supply, a casing secured upon the boiler and extending longitudinally thereof, a water coil within the casing extending longitudinally thereof, a pipe extending from the frent end of'the water coil into the water space of into the boiler, means in said connection prew the boiler, a connection between the rear end of the water coil and the outlet of the tank, means in said connection for causing flow of water from the tank through the water coil venting flow from the boiler to the tank, a

conduit leading exhaust steam from the 1000- to be condensed therein.

2. A feed water heater system for loc-omos gines, a pipe connecting the rear end of the a casing with the tank and discharging into the tank, a water coil within thecasing efiecting flow of water back and forth along the top portion of the shell of the boiler, a pipe le'ad- I ing from the front end of the water coil into the water space of the boiler, a water-forcing device in front of the tank and connected with the outlet of the same, a pipeconnecti'ng the outlet of the water-forcing device with the rear end of the Water coil, and a check valve being interposed in said pipe to prevent flow toward the water-forcing device In testimony whereof I aflix my signature.

LEE 0. GARRAWAY. a s.] 

